We’ve all been there. Everyone in the house needs to obtain ready in the morning and now there’s no an ext hot water. So how long does the take for cold water to get hot? Well, the depends.

You are watching: How long does it take for a 50 gallon gas water heater to heat up


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Pre-heated water temperature and tank size are contributors to just how quickly you acquire hot water. The variety of heating elements within the heater and the heater’s power source, even if it is gas or electricity, are additionally factors. Larger tanks have actually larger volumes and also take much longer to warm up.
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In short, less water heats much more quickly than more water; so, the quantity of water you are heating, and also how hot you warmth it, identify how conveniently you gain it.


Does Your warm Water flow Seem as well Slow?

Basic Formula

One easy way to determine warm water heater circulation rates is with the use of a formula that contains just 2 variables. One variation of the formula looks like this:

Hot Water Tank dimension + heat Input rate = available Hot Water

Translation, the lot of water you are heating, to add the amount of warmth you apply to it, determines how easily you gain hot water. Think around a little point-of-use water heater or water heater for an RV. Also though the heat applied to the tank is much reduced than a whole-house water heater, the recovery prices are nice quick as result of the small holding tanks.

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To uncover out if her water heater recovery rate is slow-moving or not, apply some standard measurements used by plenty of plumbers in the business. Calculation your warm water circulation using peak intake hours, 7 a.m. Till 9 a.m.

Peak intake represents the maximum fill requirement for the water heater. This peak usage measurement represents the maximum calculation the heater will ever need come produce. If the is managing peak hours, it deserve to handle the rest of your needs.

For instance, study data mirrors that throughout peak hours, the heater requirements to create 20 gallons of warm water, heated come 140 degrees, because that the first two people to usage it, totaling 40 gallons.

Add another 20 gallons because that two an ext baths that a household of four. Dish washers need another ten gallons, and clothes washers require 20 added gallons. The complete is 90 gallons.

If you setup to usage this much hot water every morning, the just solution is a 50-gallon or larger capacityhot water tank.

The maximum draw capacity of any type of unit is about 70 percent. Attract capacity way how lot of the total easily accessible hot water you have the right to pull the end of the heater.

That method with a 50-gallon heater, 35 gallons of hot water are available at any kind of given time. You need a combination of stored warm water (tank water), add to water flowing into the tank and getting heated prior to being attracted out, to satisfy a 90-gallon demand.

This estimate mirrors that shower while washing dishes and clothes at the very same time method running the end of hot water reasonably quickly. The Einsteinian systems to this major planet-stopping issue is either: don’t perform it, buy a bigger capacity warm water heater, or change your tank model with a tankless water heater. Who’d a thunk it!?

Recovery Efficiency

Another sizing element to take into consideration is recovery time. When gas heaters warm water quicker, your recovery effectiveness rate is lower.

For gas water heaters the is 75 percent, but for electric heaters that is 100 percent. However, even at lower recovery efficiency, gas warm water heaters tho produce much more hot water much more quickly than their electric counterparts.

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At 75% restore efficiency, gas heaters produce 27.3 gallons per hour v a 30,000 BTU burner contrasted to 3.1 gallons per hour for electrical heaters v a 750-watt heater element.

Now, in defense of electrical water heaters, the big difference in warmth levels provides for a rather distorted comparison. Electric hot water heater output rises with additional heating facets and higher wattage.

As an example, at thehtrc.com, a 20,000 BTU gas heater produces 17.3 gallons the water through a 100% rise in temperature in one hour. The electrical heating element chart shows a 4,500 watt electrical facet producing 20.5 gallons that 100% increase in one hour.

This electric heating aspect is 6 times more powerful than the example above. The 20,000 BTU burner is 33% reduced than in the 30,000 (BTU example).

What is a great Water Heater recovery Rate?

For a common 40 come 50-gallon gas water heater, anything above 40 gallons/hour would certainly be thought about a good recovery rate. The greater BTU burner, the better it usually is for recovery.

For a typical 50-gallon electric water heater with twin heating elements, a 20 gallons/hour recovery price is good. Single element water heaters will of course have a reduced recovery rate.

The major Factor

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Courtesy of HotWater.com

Don’t acquire confused. The quantity of water acquiring heated, exactly how it gets heated, and the amount provided are the determining components for how long the takes the water heater to heat up.

Heating prices list exactly how much water it s okay heated every hour. The warehouse tank dimension tells you exactly how much hot water is instantly accessible when you revolve the tap.

If your family members is huge with many bathrooms, and also multiple warm water consuming activities going on in ~ the same time, on a continual basis, acquire a enlarge tank. A family of four, in a 2-bath house, through a dishwasher and clothes washer needs 90 gallons of warm water during peak intake hours.

Larger tank sizes space for family members that require a large quantity of hot water within a short duration of time. If your household needs room less, think about taking advantage of the power savings of a smaller sized tank. In this case, a 40 gallon tank will serve her needs, and also you deserve to save money by no buying a 50 gallon tank you do not need.

Bottom line: gas water heaters warm water at about two time the price of electric water heaters when heating water the is approximately 60 degrees. Watch the water heater restore table above.

If you have a gas water heater, arrangement to wait 45 minutes because that the water to gain hot after ~ the heater has actually drained its capacity. If you have an electric water heater, double that come 1.5 hours.

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Of course, through a tankless water heater, girlfriend never have to worry around the restore rate. Simply one an ext thing to consider in the tank vs tankless debate.